Atomizing oil burner head



Sept. 5, 1933. v LEAHY 1,925,329

'ATOMIZING OIL BURNER HEAD Original Filed March 16, 1929 46 97 M 5 W m daylong 1 Patented Sept. 5, 1933 1,925,329 ATOMIZING OllL BURNER HEAD v Herbert V. Leahy, Los Angeles, Calif. g

()ri ginal application March "16, 1929, Serial No. 347,524, new Patent 1,874,017, August 30,

1932. Divided and this application May 7,

1930. Serial No. 450,541

13 Claims. (01. 299-140) This invention relates to oil burner heads and oi the external and semi-internal atomizing type,

and a very. important object of the invention is to I bon which, as is Well known, is dii'licult to re move.

Another important object is to provide a construction whereby adjustment of the burner head may be made to direct the flame'at various angles without the necessity of changing the position of the piping and without the necessity of bending the pipes that lead to'the burner head. I I

Another very important object is to effect cooling of the burner head by the atomizing fluid, thus eliminating one of the greatest faults found with other burners of this type, namely, carbonization and cracking of someof the burn er parts. Carbonization of other burners. of this type is caused by the en'se h at that is reflected onto them by the walls of the combuse tion chamber or fire box with which the burners function. I

Another important object is the-production of a burner head of this type of comparatively simple construction and one in which the various parts can be readily replaced at a comparatively small cost.

Anctherobject is to effect a change in the extent of the spread of the flame, to suit the various conditions under which the burner head may be operating, by removal of but, one part of the burner head and the substitution therefor of a similar part.

.Another important object is to make provision for use of the burner head for both horizontal and vertical'flring, and to obtain the same ad'- vantages in either case. This is quite important in the securing of low manufacturing costs.

Another very important object is to make provision for feed of the fuel uponthe atomizing agent in an are at a right angle to the direction of flow of the atomizing agent. I

Another important object is to make provision for feeding of a predetermined amount of the atomizing agent to the oil slightly in advance oi the impingement of the oil against the main stream of the atoinizing agent, thus aiding in atomization of the oil into exceedingly fine particles.

Another important object is to provide a construction that will facilitate the employment of deflecting elements of various shapes and the substitution of one for the other. By employing these deflecting elements in conjunction with the construction whereby a given amount of auxiliary atoinizing agent is injected into the oil,'as mentioned above, the deflecting elements 6 function to additionally mix the oil and atomizing agent externally of the burner head, thus causing the burner head to function as a semiinternal or inter-mixture atomizing type.

Another important object is to provide a construction that will facilitate the use of either a fiat faced or a bevel-faced ring, extending laterally beyond the oil feed port so as to secure a burner head of "the semi-internal or inter-mixture atomizing type having the additional advan tage of effecting projection of the atomizing mixture, by reason of the bevel-faced ring, downwardly at the angle of bevel of said ring.

Other objects and advantageswill'appear in the subjoined detailed description: 7

The accompanying drawing illustrates the inention: v

Figure 1 is a plan View of a burner head constructed in accordance with the provisions of this invention. i

Figure 2 is an enlarged vertical section on the irregular line indicated by 22, Fig. 1.

Fig. 3 is an enlarged fragmental vertical sec tion on the line indicated by 3-3, Fig. 1. I

Fig. 4 is afragmentalhorizontal section on the line indicated by ii-, Fig. 3.

Fig. 5 is;a' horizontal section on cated by 55, Fig. 3. II I Fig. 6 is an enlarged vertical section on the line indicated by 6-6, Fig. 1. i

Fig. 7 is a sectional view similar to Fig. 3, showing a slightly modified form of the invention.

the line indi- Fig. 8 is a horizontal section on the line indicated by 8 -8', Fig. '7. I I I Fig. 9 is a sectional view similar to Fig. 3, illustrating'a still different form of the invention.

Fig. 10 is a sectional view similar to Fig. 2, illustrating a slight modification in the construction of one of the burner head sections.

First, referring to Figures lto 6 of thedraw ing, a burner head is indicated, in, general, by the character A, and is connected by oil and atomizing agent tubes 11, 12, respectively, to suitable sources of supply of fuel oil. and atoniizing agent, such as air or steam.v The tubes 11,

12, for example, may be connected to a suitable by-pass of the type disclosed in my copending application Serial Number 347,524, filed .March 16, 1929, of which this application is a division and upon which Patent Number 1,874,017 was issued on August 30, 1932.

The body of the burner head may be c0nstructed in one piece, if desired, but in the present instance, said body, preferably, is of sectional construction, there being a forward section 13 and a rear section 14. The section 13 is swivelled on the section 14 by a bolt 261, thus enabling the section 13 to be turned to angular positions with respect to the tubes 11, 12 which support the burner head. Shoulders 16 on the section 14 limit angular movement of the section 13.

The section 14 is provided with separate passages 1'7, 18 which extend lengthwise therein. The passage 17 receives oil through a threaded opening 19 into which is screwed one end of the tube 11, and the passage 18 receives the atomizing agent through a threaded opening 20 into which is screwed the tube 12. It is to be particularly noted that the atomizing agent passage 18 extends along the upper side of the head section 14 and that the oil passage 17 extends along the lower side of said section or, in other words, beneath the passage 18, thus materially shielding the oil against heat that may be reflected from the furnace onto the top of the head section 14. Also, it will be noted that the oil tube 11 lies within the atomizing agent tube 12 so that the atomizing agent protects the tube 11 from the heat radiated by the furnace.

The sections 13, 14, I provide with flat contacting faces 21, 22, respectively, and opening through the flat faces 21 are ports 23, 24. Also opening through the flat faces 22 are ports 25, 26 which are, respectively, alined at all times with the ports 23, 24, all of said ports being elongate so as to pass the atomizing fluid and the oil regardless of the angle at which the section 13 may be positioned with respect to the section 14.

The head section 13 is provided with lower and upper passages 27, 28-, that communicate with the ports 23, 24 so that, in this case also, the atomizing fluid passage 28 is above the oil passage 27, thereby entailing that the oil passage is shielded by the atomizing fluid from heat reflected on the upper side of the head section 13 from the furnace walls.

In this instance, the faces 21, 22 are held in close contact by the bolt 261 which passes through solid hub portions 262, 263 of the head sections 13, 14, respectively, the hub portion 262 separating the port 23 from the port 24 and the passage 27 from the passage 28; and the hub portion 263 separating the port 25 from the port 26 and the passage 17 from the passage 18. The port 25 communicates with the passage 1'7 and the port 26 communicates with the passage 16.

The passage 28 terminates at its forward end in a circular bore portion 29 and said bore portion 29 terminates downwardly in an annular shoulder 30 against which seats a chambered cylindrical member 31 which is provided with a threaded stud 32 that projects upwardly through the bore portion 29 and through an opening 33 in the top of the head section 13. On the outer end of the stud 32 is threaded a nut 34 whereby the member 31 is pulled tight against the seat 30.

The member 31 is provided with a transversely extending passage 35 which communicates at its rear end with the passage 27 so as to form, in eifect, a continuation of said passage 2'7. The forward end of the passage 35 communicates with a transversely extending segmental slot 36 that surrounds a portion he member 31,

which, in turn, communicates at its with an arcuate vertical oil discL said portion 39 being of a reduced diameter. in other Words, the upper end portion of the mem ber 31 is provided with an external cylindrical flange 40 which fits a bore portion of head section 13, whereas the reduced ion 9 leaves an annular recess in which is the hushg5 ing 38.

The bushing 38 is spaced somewhat flange 40' and said bushing is provided external'flange 42, which seats a face 43 of the head section. Pr wardly from the member 31, a: a threaded stud 44 on which is so 45 that bears against the under e i 46 that is held against the lower nd of the bushing 38 which projects some distance beiov the face 43. The ring 46 surrounds a reduced portion 47 of the nut 45. The lower end of the bu 38 has a portion cut away to define an are e slot 48 lying'between said bushing and the ring 46, the atomizing fluid being adapted to discharge horizontally through said slot so that the oil discharging through the arcuate slot will impinge on the stream of atemizing fluid as said atomizing fluid issues from the slot The upper face of the ring 46 is recessed at 481 so as 5 to form, in conjunction with the of the bushing 38, an expansion chart ricer the atomizing fluid. The bore of the ushing communicates with the chamber 29 through a vertical port or ports 49 in the member 31 i. ports 1; ing on opposite sides of the pa sage 35 and being separated therefrom, is clearly shown in 4. Thus, the atoniizing fluid as it 102 down-- wardly through the ports 49 protect o oil in the passage 35 fron iieat reflected. f he fur- 5 nace onto the sides of the head s In order that the member 31, ng 38 may be easily assembled in props; position in the head section 13, 'i provide a 491 in the member 31, said pin said bushing through 'a vertical bushing 38 and into a vertica head section 13, the slot op tom edge of the bushing and the l to the face 43 so that, in ber 31 and bushing 33 will i i then the bushing, with the will be slid into the here i The form of the invention mustrat i '7 and 8 is very little differen the orb .c- "tion hereinbefore described ant the pal ts that are the functional equivalents those above scribed are indicated v the r ierence char acters with the addition of the s In this form of the invention the veri iate siot 37a communicates with the but it is extended upwardly of the member 31a so with an arcuate opening 58 that said flange, thereby permitting a 148 amount of atomizing izing fluid discharging under than the oil, it follows that, in t.-

invention the oil will be dischar 37a under a pressure substantia equal to the pressure of the atomizing fluid discharging from the slot 48a.

Consequently, the resulting mixture produced at the circular line of impingement of the vertically and. horizontally directed streams will be directed aslant downwardly and forwardly from the burner, and this angle of discharge of the mixture will be governed more or less by the ring 46a which extends horizontally beyond the periphery of the bushing 38a. Thus the ring 46a is of larger outside diameter than the ring" 46 hereinbefore described. In this instance, the

the same are indicated by the same numeral por-- tions of the reference characters with the addition of the suflix b. The only difference is that the ring 4612 has that portion'ofits upper face 511), that extends beyond the periphery of the bushing 38b, substantiallyhorizontal, thus preventing any material downward deflection of the combustible mixture produced by the-burner.

Now referring, more particularly, to Fig. 10,

the parts'that functionally correspond to those.

illustrated in Fig. 2 are indicated by the same reference characters with the addition of the suffix a. Instead of the tube 11a being inside of the tube 12a, as in Fig. 2, said tubes'are eccentrically related and the passages 17a, 18a within the section 14a are modified, accordingly. It may be readily seenthat any of the burner head sections 13, 13a, 13b may be used with the burner head'section 14a, just described.

The foregoing will make clear the construction and operation of the invention and, briefly, stated, the operation isv as follows: The bushings 38, 38a or 381), and'the rings 46, 46a, or 46?) having been installed, and the head section 13 having been suitably adjusted to the desired angle relative to section 14, the valves, not shown, that control the flow of atomized'fluid'and oil to the tubes 11, 12, will be opened to admit said fluid and oil to the various passages hereinbefore described. Inthe event of the assembly being that illustrated in. Fig. 3, the oil will discharge from the slot 37 under a relatively low pressure and impinge on the atomizing stream issuing from the slot 48, thereby producing a finely atomized combustible mixture that 'is ignited and burned in a manner well understood in this art.

In the event that the assembly is that of Figure '7, apredetermined quantity of the atomizing fluid will mix to some extent with the oil in the;

slot 37a and the oil and steam (or air), will discharge from the slot 37a at the relatively high'pr'essure of said steam (or air).

The downwardly directed oil and atomizing fluid from the slot 37a will impinge upon the high pressure atomizing stream issuing from the slot 48a, thus further mixing the atomizing fluid and the oil and atomizing the oil, and the commingled streams of atomizing fluid and oil impinge upon the ring 4651., thereby still further atomizing the mixture- I In the event ofithe assembly being that of Figure 9, the same results are secured as described above in connection with Figure '7, excepting that the mixture will be discharged from the burner at a right angle to the axis of the bushing 38b.

a Special attention is directed to the construction hereinbefore described ing 31 is held tightly against the head section 13, thus making it impossible for air or steam to'leak around the ring and come in contact with the oil within the burner head. Also, to be particularly noted, is the construction of the passage for the atomizing fluid at the p, ports at the side connecting these passages, and the oil 'passagelocated between the upper and lower passages, on the one hand, and between the ports 49, on the other hand, thereby sur rounding the oil, atthat'portion of the burner that is-exposed tothe highest temperature, with I steam or air so that said oil will'not be ata higher temperature than the steam or air and, accordingly, not subjectedto cracking temperatures that'would tend to cause a deposition-of hard carbon within that portion of the burner, thus making it difficult to clean. a

Another point to be observed .is that, because of the particular construction of the headsection 13,- member. 31, bushing 38, and the studs 32, 44 and nuts 34, 45

member 31 and bushing 38 assembled with the head section 13, accessmay be had to the lower chamber for the atomizing fluid without disturbing the upper chamber for saidfluid, and,

also, access may be hadto the upper chamber without disturbing the lower chamber. I

Because of the construction,

7 and 8, providing for the atomizing fluid passing from the upper chamber through ports into.

the lower chamber and through the passage in the flange 1001,, thence into the upper portion of the slot 37a, all parts of the burner head are maintained at a temperature approximately that of the atomizing agent.

I claim: 7

1; An atomizing oil burner comprising a head provided with oil and atomizing fluid passages and provided with a bore connecting said passages, a member positioned in and sealing said bore and provided with a'passage communicating with one offthe passages in the head, said member being provided with a port communicating with the bore, an annular bushing surrounding said member and having a portion of its exterior wall cutaway to'form an arcuate discharge slot be-' tween the bushing and the wall of the bore communicating lwith the passage in saidmembena whereby the bushthe passage for the oil at the bottom, the

for separately holding the illustrated in Figs.

ring fitting against the end of said bushing having a portion spacedfrom the bushing to form a slot communicating withisaid port, and means to hold said ring toward. said bushing.

2. An atomizing oil burner comprising a head having'a vertical bore, an oil passage leading into the side of said bore, a member positioned in and sealing said bore and juxtaposed to saidpassage, a transverse passage in said member connecting with said passage, a bushing concentrically positioned'between the wall of said bore and said member, a portion of the circumference oi said bushing being cut away to form with'the wall of said bore a downwardly directed arcuate oil discharge slot therebetween both lateral dimens'ions of which may be varied by varying the depth and width of the 'cut away portion of thebushing, passages through said bushing juxtaposed to the transverse passage in said member, one of said latter passages communicating with said arcuate discharge slot, means accessible from the exterior of said head for detachably'securing said bushing to said member, said head having a passage for supplying atomizing fluid totheupper end of said boreabove said member, means defining an atomizing fluid discharge orifice-adjacent the lower end of said: head for discharging atom-izing fluid into the oil stream discharged from said arcuate discharge slot, said member having a passage extending vertically therethrough for connecting the upper endof said bore with said atomizing fluid discharge orifice. v

3. An atomizing oil burner comprising a head havinga vertical bore, an oil passage leading into the side of said bore, a member positioned in and by varying the depth and width of the cut away portion; of the bushing, passages through said bushing juxtaposed to the transverse passage in said member, one of said passages opening into the slot in said member, said passage also communicatingcwith said arcuate discharge slot in said bushing, means detachably securing said. bushing to said member, said head having a passage for supplying atomizing fluid to the upper end of said boreabove said member, means defining an atomizing fluid discharge orifice adjacent the lower end of said head for discharging atomizing fluid into the oil stream discharged from said arcuate discharge slot, said member having a passage extending vertically therethrough for connecting the upper end of said bore with said atomizing fluid discharge orifice.

4. An atomizing oil burner comprising a head having a vertical bore,.an oil passage leading into. the side of said bore, a member positioned in and'sealing said bore and juxtaposed to said passage, a transverse passage in said member connecting with said passage, a bushing concentricallypositioned between the wall of. said bore and said member, a portion of the circum-.- ference of said bushing being cut away to form with the wall of said bore an arcuate discharge slot therebetween, passages through said bushing juxtaposedto the transverse passage in said member, one of said passages communicating with said arcuate discharge slot, means detachably securing said bushing to said member, and independent means securing said member to said head, said head having a passage for supplying atomizing fluid'to the upper end of said bore above said member, means defining an atomizing' fluid discharge orifice adjacent the lower end of said head for discharging atomizing fluid into the oil stream discharged from said arcuate discharge slot, said member having a passage extending vertically therethrough for connecting the upper end of said bore with said atomizing fluid discharge orifice. V

. 5. An atomizing oil burner comprising a head having a' vertical bore, an oil passage leading into the side of 1 said bore, a member positioned in and sealing said bore and juxtaposed to said passage, a transverse passage in said member connecting with said passage, a bushing concentrically positioned between the wall of said bore and said. member, a portion of the circumference of said bushingbeing cut away to form with the Wall of said bore an arcuate discharge slot therebetween, passages through said bushing lower end of said head for discharging atomizing fluid into the oil stream discharged from said arcuate discharge slot, said member having a passage extending vertically therethrough for connecting the upper end of said bore with said atomizing fluid discharge oriflce.

6. An atomizing oil burner comprising a head having a vertical bore, an upper atomizing fluid passage in said head leading intosaid bore, a lower oil passage in said head leading into said bore, a member positioned in and sealing said bore and juxtaposed to said lower passage, a' transverse passage in saidmember connecting with said lower passage, a vertical portin said member communicating with said bore, a bushing concentrically positioned between the Wall of said bore and said member, a portion of the cir-.

cumference of said bushing being cut away to form with the wall of said bore an arcuate vertical discharge slot therehetween, passages through said bushing juxtaposed to the transverse passage in said member, one of said passages cornmunieating with said arcuate discharge slot, an atomizing fluid discharge slot in said bushing below said arcuate oil discharge slot whereby fluid issuing from the atomizing fluid discharge slot impinges onthe oil stream issuing from said arcuate discharge slot, and. meansdetachably securing said bushing to saidmember,

'1. An atomizing oil burner, as described in claim 6, further characterizedin that said member contains two vertical ports communicating with said bore, saidlports being positioned respectively on either side of said transverse passage.

a 8. An atomizing oil burner, as described in claim l, characterized in that said means for holding said ring towards said bushingicomprises a stud extending downward from said member and a nut screwed on said stud exterior of said ring, i

9. An atomizing oil burner comprising a head having a Vertical here, an upper atomizing fluid passage in said head leading into the side of said bore, a lower oil passage in said head leading into the side of said bore, a member positioned in and sealing said bore containing a transverse passage juxtaposed to said oil passages in said head, a horizontal slot in said member connecting with said passage, a bushing concentrically positioned between the wall of said bore and said membena portion of the circumference of said-bushing extending below the horizontal slot in said member beingcut away to form with thewall of said bore an arcuate vertical discharge slot therebetween, vertical ports in said member communicating with said bore, a ring juxtaposed to the end of said bushing, a portion of the'lower edge of said bushing being cut away to form a horizontal slot between the bushing and said ring, the outer edge of said ring being flush with the outer face of said bushing, and means forholding said ring against said bushing. A v i ,10. An atomizing oil burner, as described in claim'9, except that said ring extends radially out beyond the outer circumference of said bushing and has a beveled upper edge.

11. An atomiaing oil burner, as described in claim 9, except that said ring extends radially beyond the outer circumference of said bushing, and has a substantially horizontal upper face.

12. An atomizing oil burner comprising a head having a v rtical bore, an upper atomizing fluid passage in said head entering the upper portion of said bore, a rower oil passage in said head entering said bore, a member positioned in and sealing said here between the points of entry or" said upper and lower passages and sealing about the point of entry of said lower oil passage, an atomizing fluid chamber being provided between the upper part of said member and the top of the bore, a transverse oil passage in said member juxtaposed to and connected with said lower passage in said head, a bushing concentrically positioned between said member and the wall of said bore, a portion of the outer wall of said bushing being cut away to form an arcuate discharge passage connected with said transverse passage,

and a portion of the top of said member being cut away to provide a passagebetween the atomizing fluid chamber above said member and said arcuate discharge passage, a ring secured against the lower end or" said bushing forming a lower chain er therebetween, ports in said member connecting said upper and lower chambers, a portion of the bushing adjacent said ring being cut away to form an atomizing fluid discharge passage between said bushing and ring.

13. An atomizing oil burner comprising a head having a vertical bore therein, an inwardly extending shoulder at the upper end of said bore,

an outwardly extending shoulder at the lower end.

bore an arcuate discharge slot therebetween, passages through said bushing juxtaposed to the transverse passage in said member and communicatingtherewith, one of said passages also communicating with said arcuate discharge slot, an outwardly extending shoulder on said bushing sealing with the outwardly'extending shoulder at the lower end of said bore, means for securing said member to said head with its shoulder in compression against said inwardly extending shoulder, and independent means for securing said bushing to said memberwith its outwardly extending shoulder in compression against the shoulder at the lower end of said bore.

HERBERT V. LEAHY. 

